Concrete Short Column Design

Short Column Criteria:

To check if a short column is present then the following conditions must be met. Otherwise check to see if you fit under the Concrete Long Column Design type procedure. Ideally, solving for a short column will be easier than a long column.

If the structure is part of a braced system then:

{kl_u\over{r}}\le 34-12{M_1\over{M_2}}\le 40

If the structure is part of a unbraced system then:

{kl_u\over{r}}\le 22

where:

k = the effective length factor (can be conservatively taken as 1.0 [1])lu = clear height of the columnM1 = the smaller absolute value of the two end moments acting on the columnM2 = the larger absolute value of the two end moments acting on the columnr = radius of gyration

Concrete Short Column Analysis

Several methods for concrete short column design have been provided below including: